ATI Allvac® VascoJet® 1000 Specialty Steel, Heat Treatment: 1010°C (1850°F) Q+T

ATI Allvac® VascoJet® 1000 Specialty Steel, Heat Treatment: 1010°C (1850°F) Q+T Product Information -:- For detailed product information, please contact sales. -: ATI Allvac® VascoJet® 1000 Specialty Steel, Heat Treatment: 1010°C (1850°F) Q+T Synonyms -:- For detailed product information, please contact sales. -:

ATI Allvac® VascoJet® 1000 Specialty Steel, Heat Treatment: 1010°C (1850°F) Q+T Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: ATI Allvac® VascoJet® 1000 Ultra-High-Strength Steel (Q+T Condition)** **ATI Allvac® VascoJet® 1000** is a cobalt-nickel secondary hardening ultra-high-strength steel, representing the pinnacle of commercially available strength-to-toughness combinations. It was developed specifically for aerospace applications requiring **extreme strength, excellent fracture toughness, and good stress corrosion cracking resistance**. The **1010°C (1850°F) Quench and Temper (Q+T)** heat treatment process unlocks its unparalleled mechanical properties. #### **1. Key Characteristics & Advantages** * **Unmatched Strength-Toughness Combination:** Achieves tensile strengths exceeding **1,930 MPa (280 ksi)** while maintaining exceptional fracture toughness, a rare and critical combination. * **Secondary Hardening:** Gains strength and hardness during tempering due to the precipitation of fine intermetallic phases, allowing for high-temperature stability. * **Excellent Stress Corrosion Cracking (SCC) Resistance:** Superior to many other ultra-high-strength steels like 4340 or 300M, making it suitable for demanding environments. * **Deep Hardenability:** Can be through-hardened in substantial sections with minimal distortion due to its high alloy content and air-hardening capability. * **Good Weldability (with precautions):** Can be welded using proper techniques, which is exceptional for a steel at this strength level. #### **2. Standard Specifications & International Designations** * **Proprietary Grade:** VascoJet 1000 is a trademarked grade. It is not covered by common AISI/SAE standards. * **AMS:** Often supplied to meet the requirements of **AMS 6528** (Steel, Corrosion-Resistant, Investment Castings) or customer-specific aerospace material specifications. * **U.S. Military:** Conforms to **MIL-S-89485**. * **EURONORM / ISO:** No direct equivalent. It is typically specified under proprietary or project-specific designations in international programs. #### **3. Chemical Composition (Typical, Weight %)** | Element | Content (%) | Element | Content (%) | | :--- | :--- | :--- | :--- | | **Carbon (C)** | 0.23 - 0.27 | **Cobalt (Co)** | 12.00 - 13.00 | | **Nickel (Ni)** | 10.00 - 11.00 | **Chromium (Cr)** | 2.50 - 3.25 | | **Molybdenum (Mo)** | 1.20 - 1.50 | **Vanadium (V)** | 0.07 - 0.12 | | **Silicon (Si)** | 0.10 max | **Manganese (Mn)** | 0.10 max | | **Sulfur (S)** | ≤ 0.005 | **Phosphorus (P)** | ≤ 0.010 | | **Iron (Fe)** | Balance | #### **4. Heat Treatment: 1010°C (1850°F) Quench & Temper** This specific thermal cycle is critical for developing the optimal microstructure: * **Austenitizing:** Heat to **1010°C (1850°F)** and hold to achieve full solutioning of alloying elements. * **Quenching:** Cool in **air or positive pressure gas**. The high alloy content ensures full martensite transformation with low risk of distortion or cracking. * **Cryogenic Treatment:** A sub-zero treatment (e.g., -73°C / -100°F) is typically performed immediately after quenching to transform retained austenite and maximize stability. * **Tempering (Double or Triple Temper):** Performed at **480°C to 510°C (900°F to 950°F)**. This is where **secondary hardening** occurs, precipitating complex (Co, Mo, Ni) intermetallics, leading to peak strength and toughness. * **Final Hardness:** Typically **HRC 54 - 58**, resulting in its ultra-high strength. #### **5. Typical Physical & Mechanical Properties (After Q+T)** * **Density:** 7.99 g/cm³ (0.289 lb/in³) * **Modulus of Elasticity:** 200 GPa (29 x 10⁶ psi) * **Ultimate Tensile Strength:** **1,930 - 2,070 MPa (280 - 300 ksi)** * **Yield Strength (0.2% Offset):** **1,790 - 1,930 MPa (260 - 280 ksi)** * **Elongation:** 10 - 14% * **Reduction in Area:** 45 - 55% * **Fracture Toughness (K_Ic):** **110 - 130 MPa√m (100 - 120 ksi√in)** – Exceptional at this strength level. * **Hardness:** **54 - 58 HRC** #### **6. Primary Applications** VascoJet 1000 is reserved for the most demanding aerospace structural components: * **Aircraft Landing Gear Components:** Critical parts such as pistons, rods, and structural links for fighter jets and high-performance aircraft. * **Rocket Motor Cases & Launch Vehicle Components** * **Arrestor Hooks & Catapult Components** on aircraft carriers. * **High-Stress Airframe Fittings and Forgings** * **Critical Fasteners and Pins** in safety-of-flight systems. * **Race Car and Motorsport Suspension Components** (high-end applications). #### **7. Availability & Processing Notes** * **Forms Available:** Primarily available as premium **Vacuum Induction Melted + Vacuum Arc Remelted (VIM-VAR)** forgings, billets, and bars to ensure ultra-cleanliness and homogeneity. * **Machining:** Must be machined in the annealed or normalized condition. Finish machining after heat treatment is difficult and typically limited to grinding or EDM. * **ATI Allvac® Expertise:** ATI provides this advanced material with stringent quality controls, including ultrasonic inspection, to meet the critical integrity requirements of aerospace and defense applications. --- **Disclaimer:** The information provided is for reference purposes. VascoJet 1000 is a highly specialized material. Processing, properties, and performance are highly dependent on precise heat treatment and manufacturing controls. For all critical applications, consult ATI Allvac technical data sheets and engage with their engineering support team. -:- For detailed product information, please contact sales. -: ATI Allvac® VascoJet® 1000 Specialty Steel, Heat Treatment: 1010°C (1850°F) Q+T Specification Dimensions Size： Diameter 20-1000 mm Length <6840 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: ATI Allvac® VascoJet® 1000 Specialty Steel, Heat Treatment: 1010°C (1850°F) Q+T Properties -:- For detailed product information, please contact sales. -:

Applications of ATI Allvac® VascoJet® 1000 Specialty Steel, Heat Treatment: 1010°C (1850°F) Q+T -:- For detailed product information, please contact sales. -: Chemical Identifiers ATI Allvac® VascoJet® 1000 Specialty Steel, Heat Treatment: 1010°C (1850°F) Q+T -:- For detailed product information, please contact sales. -:

Packing of ATI Allvac® VascoJet® 1000 Specialty Steel, Heat Treatment: 1010°C (1850°F) Q+T -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3311 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition